These tables are used, with the rules in Section 3, to define the assigned vulnerability class for each given combination of input parameters. They have been slightly modified from the tables used to derive Version 1 of the groundwater vulnerability dataset (Ball et al. 2004[1]), as follows:

Vulnerability Class 4 has been subdivided throughout into two sub-classes, Class 4a and Class 4b. Class 4a includes areas where superficial deposits have low permeability; Class 4b includes areas where superficial deposits have moderate or high permeability. The tables have been amended to reflect this.

Because of this change, one table (the original Table 2) has been removed as no longer needed.

Table A5 Superficial Deposits Permeability at surface = High or Very High; there is a water table in superficial deposits (Superficial Deposits Thickness > Depth to Water in Superficial Deposits) (Rule 1).